Jack



May 26, 1925. 1 539 642 A. E. BURNSIDE JACK File n 25, 1924 2 Sheets-Sheet '1 /ffllllg :s

WITNESS: I ATTORNEY A. E. BURNSIDE May 26, 1 925.

JACK

il June 25, 1924 2 Sheets-Sheet 2 fll 320772151218.

mvswron 6 BY M I ATTORNEY WITNESS:

Patented May 26, 1925,

UNITED STATES PATENT QFFECE.

JACK.

Application filed June 25, 1924. Serial No. 722,379.

Tor U who/11, it may 6071067 71.

lie it known that l, ARTHUR E. BURNsIDE, a citizen of the llnited States, residing at South rlacl sonville, 1n the county of Duval and Stat-1t of Florida. have invented new and ff] n 1 '1 J. l w 0 T'w 11-.., in lmpioieihcn s m dCMb, or n non 16 following is a specification.

This invention relates to a jack, the gen (2 on the nut member by anti-friction bearings.

This invention also consists in certain other features of construction and in the combination and arrangement of the several parts, to be hereinafter fully described, illustrated in the accon'ipanying drawings and specifically pointed out in the appended clain'is.

in describing my invention in detail, reference will be had to the accompanying drawings wherein like characters denote like or corresponding larts throughout the sev eral views. and in which Figure l is an elevation of the jack.

Figure '2 is a longitudinal Sectional view.

l igurc 3 is substantially a section on line 3 of Figure 2.

Figure 4: is a view similar to Figure 2 but taken at right angles therefrom.

Figure 5 is a detail view showing the circuit breaker about to be moved to open position by the projection on the upper collar.

Figure (3 is a similar view showing the lower circuit breaker about to be opened.

lligure i is a plan view of one ofthe collars with the circuit breaker thereon.

Figure R is a view of the casing for the upper part of the device.

Figure 9 is a diagrammatic view of the circuits.

In these views, 1 indicates the spirally threaded supporting shaft which has a base 2 fastened to its lower end and upper and lower collars 3 are adjustably connected with the shaft. Each collar has a projection 3 thereon. The shaft passes through a housior enclosing the parts and operateding or casing i and a hub or nut member 5 is arranged in the housing and engages the shaft. This member is supported by the anti-friction bear rgs 6 which are engaged by the threaded collars 7 in the housing so that the bearings can be adjusted to take up wear. The upper collar is connected with the shaft by a key 7 which engages a longitudinally extending groove 8 in the shaft. A worm gear 9 is carried by the hub 5 and this gear is engaged by a worm. 10 on a shaft 11 j ournaled in the casing and to which is connected :1 gear 12 which meshes with a pinion 13 on the shaft of'the motor 14, which is fastened to the plate 15 forming part of the housing; The housing carries a seat for the object to be lifted and the drawings show this seat being made in the form of a sectional ring-shaped member 16 for engaging an axle of a vehicle. Circuit breakers 17 are connected withv the collars 7 in such a manner that the projections 3 on the collars 8 will open the circuit breakers at the limits of movement of the parts and such limits can be varied by'adjusting the collars 3 on the shaft. Thus the motor will be stopped automatically at the limits of movement of the shaft.

From the foregoing it will be seen that the rotary motion of the motor is communicated to the hub or nut member 5 so as to cause the same to move longitudinally on the shaft 1. due to its threaded connection with said shaft or to cause moven'ient of the shaft in the nut member when the casing or housing 4: is held stationary.

When the device is used for lifting a vehicle, it is attached to an axle of the same by the clamp 16. The shaft 1 will move dow'iwardly upon the starting of the motor v until its base strikes the ground when further movement of the shaft will be prevented and then the housing will move upwardly on the shaft and carry a part of the vehicle with it. As soon as the projection on upper collar 3 strikes the circuit breaker on the upper collar 7 the motor will be stopped and the parts will come to rest in this position. Then when it is desired to lower the vehicle the motor is started up but in the reversed direction so that the housing moves downwardly until the wheel of the vehicle strikes the ground when further movement of the housing is prevented and then the i switch for controlling the circuit to the jack.

shaft 1 moves upwardly until the lower pm jection 3 strikes the circuit breaker on the lower collar 7 and stops the motor.

7 I may provide a sleeve 18 for the upper end of the shaftito cover the same and I prefer to provide a three-pole, two-throw When the jack is in raised position with the pro ectlon'on the lower collar engaging the lower circult breaker and the operator wishes to lower the :foot plate or base to the ground i he would move the switch lever a of the switch A from its lower position, as shown in Figure 9, to its raised position and then current would flow from the battery B through the condi'ictors b through the two arms a of the switch lever to conductor 0 to the upper circuit breaker and from said which will cause the shaft- 1 to be lowered until its base 2 strikes the ground. when Ling a spirally threaded shaft, a housing further movement of the shaft will be prevented and then the housing 4 will travel up the shaft until the upper projection 3 strikes the upper circuit breaker and breaks the circuit to the motor and stops the same. Then by swinging the switch lever a downwardly to the position it occupies in Figure 9, the motor will be connected with the battery through the connections which include the lower circuit breaker and thus the motor will be revolved in an opposite direction so that the shaft- 1 is lifted until the lower projection 3' strikes the lower circuit breaker and stops further movement of the parts.

I may use four of these jacks on a vehicle so that they form a permanent part of the vehicle and thus permit the vehicle to be raised whenever desired. 7 It is thought from the foregoing description that the advantages and novel features of my invention will be readily apparent.

I desire it to be understood that I may make changes in the construction and in the combination and arrangement of the several,

parts, provided that such changes fall within the scope of the appended claims.

What I claim is '1. A jack of the class described comprising a spirally threaded shaft, a base for the same, a housing through which the shaft passes, a nut member in the housing and engaging the shaft, anti-friction bearings for the nut member, collars threaded in the ends of the housing for adjustably supporting the bearings from the housing, a motor and means for rotating the nut member from the motor.

2. A jack of the class described comprismovably mounted on the shaft, a nut member rotatably supported in the housing and engaging the shaft, motor operated means for rotating the nut member circuits for the motor, switches arranged in the circuits and located on the housing and circuit breakers adjustably mounted on the shaft adjacent its ends for opening the switches.

Irrtestimony whereof I afiix my signature.

ARTHUR E. BURNsInn 

